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Anatomy

Flue

The internal passage that carries combustion gases up and out.

All glossary terms

What is Flue?

The vertical channel inside your chimney that carries smoke, water vapor, and CO outside. May be unlined masonry (old construction, problematic), clay-tile lined (most masonry chimneys), or metal-lined (modern). A cracked flue is a fire hazard.

Related terms:LinerFlue Tile

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Active leak, animal in flue, post-fire damage, or smoke event? Real humans on the line 7 AM to 12 AM every day — replies in under 2 minutes. Tech dispatch within 2 hours during business hours, subject to crew availability after-hours.

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